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xwarp:

--- Quote from: 0culus on March 08, 2019, 11:57:48 pm ---Very nice HP 8566A. My plan is to track down the parts I need to convert it into a B RF section.

--- End quote ---

I've got an 8568b. Don't really use it for much over the FM band, but I am still on the lookout for an 8566 rf section.

xwarp:
Local electronics supply store pick up. 43 dollars.....because I needed it less than I think..... :-DD

Neomys Sapiens:
Now this 'Modulation Meter' makes sense to me. Opposed to, for example, the Marconi  TF 2304. How can a modulation meter be a untuned instrument? Modulation of what? Or is it supposed to be fed with one signal only, like a transmitter monitor? But for FM, it must still be told somehow where the carrier is!

0culus:

--- Quote from: Berni on March 09, 2019, 09:44:14 am ---Yeah the thing is hefty, i think i remember the thing being around 50 kg (110 lb) all together. So they had a very good reason to split it into two boxes, even just lifting half of it takes a good bit of effort.

The HP engineers that worked on it called it the "doomsday spectrum analyzer" and was for a good time among the highest performance spectrum analyzers in the world.

--- End quote ---

The 8568B system is 112 lbs I believe. The 8566A I just got...could be as much as 130 lbs. The RF section is definitely heavier than the 68B RF section.


--- Quote from: xwarp on March 09, 2019, 04:30:41 pm ---
--- Quote from: 0culus on March 08, 2019, 11:57:48 pm ---Very nice HP 8566A. My plan is to track down the parts I need to convert it into a B RF section.

--- End quote ---

I've got an 8568b. Don't really use it for much over the FM band, but I am still on the lookout for an 8566 rf section.

--- End quote ---

Me neither at the moment...until I move I'm going to try to avoid digging into any serious projects. Makes band surveillance fun though. :) My plan eventually is to do ham work in the microwave bands, up to Ku band. Prices for connectors and things start to go up very fast above that.

xwarp:
Yeah, I'm almost tempted to offer up for trade an 8591e for a working 8566b rf section.

The FM/AM modulation meter I posted above works. Had to track down a failure that prevented the "Set FM Cal" function from working. Turned out to be a bypass cap being shorted.

Now to bench the Tek 485 scope that just crapped out on me....

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